Crack Detection in a Rotor Dynamic System by Vibration Monitoring—Part I: Analysis-Reference-Cited by-同舟云学术

Crack Detection in a Rotor Dynamic System by Vibration Monitoring—Part I: Analysis

Published:2005-04-01 Issue:2 Volume:127 Page:425-436
ISSN:0742-4795
Container-title:Journal of Engineering for Gas Turbines and Power
language:en
Short-container-title:

Author:

Green Itzhak¹,Casey Cody²

Affiliation:

1. Georgia Institute of Technology, GWW School of Mechanical Engineering, Atlanta, GA 30332

2. Schlumberger, 14910 Airline Road, Rosharon, TX 77583

Abstract

Many practical rotor dynamic systems contain shaft/rotor elements that are highly susceptible to transverse cross-sectional cracks due to fatigue. The early detection of mechanical malfunction that can be provided by an effective vibration monitoring system is essential. Two theoretical analyses, global and local asymmetry crack models, are utilized to identify characteristics of the system response that may be directly attributed to the presence of a transverse crack in a rotating shaft. A model consisting of an overhung whirling rotor is utilized to match an experimental test rig. A 2X harmonic component of the system response is shown to be the primary response characteristic resulting from the introduction of a crack. Once the unique characteristics of the system response are identified, they serve then as target observations for the monitoring system.

Publisher

ASME International

Subject

Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering

Link

http://asmedigitalcollection.asme.org/gasturbinespower/article-pdf/127/2/425/5705440/425_1.pdf

Reference37 articles.

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2. Lee, A. S., and Green, I., 1994, “Rotordynamics of a Mechanical Face Seal Riding on a Flexible Shaft,” ASME J. Tribol., 116(2), pp. 345–351.

3. Lee, A. S., and Green, I., 1994, “Higher Harmonic Oscillations in a Noncontacting FMR Mechanical Face Seal Test Rig,” ASME J. Vibr. Acoust., 116(2), pp. 161–167.

4. Lee, A. S., and Green, I., 1995, “An Experimental Investigation of the Steady-State Response of a Noncontacting Flexibly Mounted Rotor Mechanical Face Seal,” ASME J. Tribol., 117(1), pp. 153–159.

5. Lee, A. S., and Green, I., 1995, “Physical Modeling and Data Analysis of the Dynamic Response of a Flexibly Mounted Rotor Mechanical Seal,” ASME J. Tribol., 117, pp. 130–135.

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